/**
 * 
 * @version        $Id: float.js 1 22:28 2010年7月20日Z tianya $
 * @package        DedeCMS.Administrator
 * @copyright      Copyright (c) 2007 - 2010, DesDev, Inc.
 * @license        http://help.dedecms.com/usersguide/license.html
 * @link           http://www.dedecms.com
 */
 
<!--
self.onError=null; 
currentX = currentY = 0; 
whichIt = null; 
lastScrollX = 0; lastScrollY = 0; 
NS = (document.layers) ? 1 : 0; 
IE = (document.all) ? 1: 0; 
function heartBeat(){ 
    if(IE) { diffY = document.body.scrollTop; diffX = document.body.scrollLeft; } 
    if(NS) { diffY = self.pageYOffset; diffX = self.pageXOffset; } 
	if(diffY != lastScrollY)	{ 
		percent = .1 * (diffY - lastScrollY); 
		if(percent > 0) percent = Math.ceil(percent); 
		else percent = Math.floor(percent); 
		if(IE) document.all.floater.style.pixelTop += percent; 
		if(NS) document.floater.top += percent;  
		lastScrollY = lastScrollY + percent; 
	} if(diffX != lastScrollX){ 
		percent = .1 * (diffX - lastScrollX); 
		if(percent > 0) percent = Math.ceil(percent); 
		else percent = Math.floor(percent); 
		if(IE) document.all.floater.style.pixelLeft += percent; 
		if(NS) document.floater.left += percent; 
		lastScrollX = lastScrollX + percent; 
	} 

}                            

function checkFocus(x,y){  
	stalkerx = document.floater.pageX; 
	stalkery = document.floater.pageY; 
	stalkerwidth = document.floater.clip.width; 
	stalkerheight = document.floater.clip.height; 
	if( (x > stalkerx && x < (stalkerx+stalkerwidth)) && (y > stalkery && y < (stalkery+stalkerheight))) return true; 
	else return false; 
} 

function grabIt(e) { 
	if(IE)	{ 
		whichIt = event.srcElement; 
		while (whichIt.id.indexOf("floater") == -1){ 
			whichIt = whichIt.parentElement; 
			if (whichIt == null) { return true; } 
		} 
		whichIt.style.pixelLeft = whichIt.offsetLeft; 
		whichIt.style.pixelTop = whichIt.offsetTop; 
		currentX = (event.clientX + document.body.scrollLeft); 
		currentY = (event.clientY + document.body.scrollTop);    
	} else	{  
		window.captureEvents(Event.MOUSEMOVE); 
		if(checkFocus (e.pageX,e.pageY)) {  
			whichIt = document.floater; 
			StalkerTouchedX = e.pageX-document.floater.pageX; 
			StalkerTouchedY = e.pageY-document.floater.pageY; 
		}  
	} return true; 
	} 

function moveIt(e) { 

    if (whichIt == null) { return false; } 
	if(IE) { 
        newX = (event.clientX + document.body.scrollLeft); 
		newY = (event.clientY + document.body.scrollTop); 
		distanceX = (newX - currentX);    distanceY = (newY - currentY); 
		currentX = newX;    currentY = newY; 
		whichIt.style.pixelLeft += distanceX; 
		whichIt.style.pixelTop += distanceY; 
		if(whichIt.style.pixelTop < document.body.scrollTop) whichIt.style.pixelTop = document.body.scrollTop; 
		if(whichIt.style.pixelLeft < document.body.scrollLeft) whichIt.style.pixelLeft = document.body.scrollLeft; 
		if(whichIt.style.pixelLeft > document.body.offsetWidth - document.body.scrollLeft - whichIt.style.pixelWidth - 20) whichIt.style.pixelLeft = document.body.offsetWidth - whichIt.style.pixelWidth - 20; 
		if(whichIt.style.pixelTop > document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5) whichIt.style.pixelTop = document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5; 
		event.returnValue = false; 
	} else	{  
		whichIt.moveTo(e.pageX-StalkerTouchedX,e.pageY-StalkerTouchedY); 
		if(whichIt.left < 0+self.pageXOffset) whichIt.left = 0+self.pageXOffset; 
		if(whichIt.top < 0+self.pageYOffset) whichIt.top = 0+self.pageYOffset; 
		if( (whichIt.left + whichIt.clip.width) >= (window.innerWidth+self.pageXOffset-17)) whichIt.left = ((window.innerWidth+self.pageXOffset)-whichIt.clip.width)-17; 
		if( (whichIt.top + whichIt.clip.height) >= (window.innerHeight+self.pageYOffset+50)) whichIt.top = ((window.innerHeight+self.pageYOffset)-whichIt.clip.height)-17; 
		return false; 
	} 
	return false; 
} 

function dropIt() { 
	whichIt = null; 
	if(NS) window.releaseEvents (Event.MOUSEMOVE); 
	return true; 
} 
if(NS) { 
	window.captureEvents(Event.MOUSEUPEvent.MOUSEDOWN); 
	window.onmousedown = grabIt; 
	window.onmousemove = moveIt; 
	window.onmouseup = dropIt; 
} 
if(IE) { 
	document.onmousedown = grabIt; 
	document.onmousemove = moveIt; 
	document.onmouseup = dropIt; 
} 
if(NS || IE) action = window.setInterval("heartBeat()",1);
-->